Flight International Airport departs from Osaka International Airport at 14:30 and arrives at Tokyo Haneda Airport at 15:40.
The flighttime is about 1h 10m. The distance travelled ("as the bird flies"): 485 Km. So the average speed is roughly 416 Km.
The best day to arrive at Osaka is Sunday and it would be best to avoid Monday, as prices are on average 75.04% higher than on Sunday. (Average prices, based on 1857028 datapoints.)
We have a lot more statistics for flights JL 120 and between Osaka and Tokyo.